ML20086G136
| ML20086G136 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 07/16/1976 |
| From: | Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Stello V Office of Nuclear Reactor Regulation |
| References | |
| RO-76-30, NUDOCS 8401100091 | |
| Download: ML20086G136 (2) | |
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PHILADELPHIA ELECTRIC COMPANY 2301 MARKET STREET PHILADELPHIA, PA.19101 (215)8414000
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Mr. Victor Stello, Jr.
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Division of Operating Reactors sf 3
Office of IIuclear Reactor Regulations y
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United States Nuclear Regulatory Commission Washington, D.C.
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Dear Mr. Stello:
Subject:
Environmental Deviation The following deviation was reported to Mr. Walt Baunack, Office of Inspection and Enforcement, Region 1, United States Nuclear Regulatory Cornmission on July 8,1976.
Reference:
License Number DPR-44/56 Environmental Technical Specifications:
2.2.2 Report No. :
50-277/278-76-30 Report Date:
July 16, 1976 Deviation Date:
July 7, 1976 Facility:
Peach Bottom Atomic Power Station Units 2 & 3 R.D.
1, Delta, PA 17314 Identification of Deviation:
The pH for the settling basin effluent exceeded the range allowable by the Environmental Technical Specifications.
Conditions Prior to Deviation:
Settling basin operating with maximum holdup.
Raw water surp in automatic code of operation.
0401100091 760716 PDR ADOCK 05000 S
74o0 COPY SEM REGION J' % _
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Mr. Victor Stello, Jr.
50-277/278-76-30 July 16, 1976 Page 2 Description of Deviation:
The pH of two grab samples taken from the settling basin measured 4.8 and 5.3.
A sample taken two hours latter measured 10.0.
The pH returned to the allowable range (6.0 to 9.0) within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> of the original sampling.
Designation of Apparent Cause of Deviation The initial low pH valve was due to a lack of soda ash addition to the clarifier during continuing alum feed.
This resulted in a low pH in the raw water sump which is pumped to the settling basin.
An investigation of the 10.0 pH did not reveal any apparent cause.
Analysis of Deviation:
Due to the short duration of the occurrence and because the settling basin flow is diluted by a factor of 100,000 with circulating water flow, the pH of the circulating water was unaffected.
Therefore, the environmental impact was minimal.
Corrective Action:
A memo which clearly describes proper action during clarifier malfunction is being sent to operators and supervision.
Failure Data:
Environmental Deviation Reports 50-277/278-76-20, 50-277/278-76-5 Very truly yours, 3
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W e <
M. J. Cooney Superintendent Generation Div.-Nuclear MJC:mam cc:
Mr. J. P. O'Reilly K3C Reg. Office i
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